After beating the demo and testing out the Fracture upgrade. It does not what I was expecting. Meaning if a block has 20 hp and you hit for 300 on it's side. With a fracture lvl at 20% (which cost a LOT btw), it does 20% of 20 to the blocks besides, rather than the 300 of damage.
Meaning Fracture damage is based on the damage dealt to a block with NO overflow damage. Making it pretty much useless since oneshoting blocks is really easy and there is no gain of AOE damage as Fracture suggest it.
Also the Click Speed upgrade is rather useless, it cost a LOT to bring it to 7 CPS when I already click at 7 CPS manually with my 'slow' method. I'm at 12 CPS with my more consistant clicking methods. I understand this upgrade is a QOL but I would expect to go over a normal CPS with higher upgrade. This feels to encourage an Auto Clicker.
Worker upgrades are rather useless too when you compare with the Click upgrades from the Runes (money per Crits and AOE), making worker 'meta' rather underwhelming. Also the Runes upgrade for workers (worker cap) is rather useless, since the cost of workers is insanely high (at least in the demo).
Tdlr: good game, but requires balancing
I'll wholly agree on the click speed upgrades. Using an autoclicker makes virtually everything else irrelevant, especially when paired with the rune upgrade that spreads out your click effects to more blocks. The base hold-click speed is in a good place, I think, but the "manual" clicking throttle probably needs to be brought down to about half of what it was.